Here is another post in [Solved] category . I believe the proposed solution will work on all flavor of Linux system. But I have encountered the “Problem” and found “Solution” on OpenSuse – 12.1.

After installation of OS , I was shocked to see that the Realtek ethernet device is not recognized by OS. I suspected that , probably the required driver is not installed/available with OS. So I followed the below explained steps and hit the solution. You must be logged in into the system with root credential to do this exercise.

Make ifconfig eth0 up.

To know the device name we can see the hardware detail of system OR make eth0 device up by below command.

$ ifconfig eth0 up

Check device name.

open the file with “vi /etc/sysconfig/network/ifcfg-eth0”. In this file device name will be listed as bellow “NAME=’RTL8101E/RTL8102E PCI Express Fast Ethernet controller’ “

Find Driver for Ethernet Controller.

The above step gives me enough clue that, I need to search for driver of Realtek ethernet controller. Which leads me to the below link.